標題:
發問:
1. (+26)-(-15) 2. (-12)+(-19) 3. (-28)-(+13) 4. (-27)+(+34) 5. (-12)+(+27)-(+20) 請解释答案...................................... THX
最佳解答:
1. (+26)-(-15) = 26+15 = 41 2. (-12)+(-19) =-12-19 =-31 3. (-28)-(+13) = -28-13 =-41 4. (-27)+(+34) =-27+34 =7 5.(-12)+(+27)-(+20) =-12+27-20 =5 記住: 負負得正,正正得正,負正得負 !!!!!!!!!
其他解答:
cheng_cwpeter回答唔錯,,, 但係最後一題 : 5. (-12)+(+27)-(+20) 唔係正5呀,,,,,,係負5呀,,,佢計錯
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Maths(20)發問:
1. (+26)-(-15) 2. (-12)+(-19) 3. (-28)-(+13) 4. (-27)+(+34) 5. (-12)+(+27)-(+20) 請解释答案...................................... THX
最佳解答:
1. (+26)-(-15) = 26+15 = 41 2. (-12)+(-19) =-12-19 =-31 3. (-28)-(+13) = -28-13 =-41 4. (-27)+(+34) =-27+34 =7 5.(-12)+(+27)-(+20) =-12+27-20 =5 記住: 負負得正,正正得正,負正得負 !!!!!!!!!
其他解答:
cheng_cwpeter回答唔錯,,, 但係最後一題 : 5. (-12)+(+27)-(+20) 唔係正5呀,,,,,,係負5呀,,,佢計錯
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